Why Shane Watson flew back to Australia?

Shane Watson Australian test vice-captain left the team in India last night and flew back to Australia. According to news coach Mickey Arthur dumped Watson, Mitchell Johnson, James Pattinson and Usman Khawaja from the upcoming matches.
According to the team management the Watson wanted to be with his pregnant wife Lee, who is due to give birth at the end of the month. But Watson clarified to the Sydney morning Herald that he was also reconsidering his test future and would "weigh up options" after the "harsh" decision.
For more read: http://timesofindia.indiatimes.com/sports/cricket/series-tournament/australia-in-india-2013/top-stories/Miffed-Shane-Watson-to-quit/articleshow/18917447.cms